tmux: update 2.1 bottle for Linuxbrew.
tmux: update 2.1 bottle for Linuxbrew.

Homebrew/linuxbrew,saketkc/linuxbrew,reelsense/linuxbrew,Linuxbrew/linuxbrew,SuperNEMO-DBD/cadfaelbrew,Homebrew/linuxbrew,Linuxbrew/linuxbrew,gnubila-france/linuxbrew,Angeldude/linuxbrew,Linuxbrew/linuxbrew,Homebrew/linuxbrew,Linuxbrew/linuxbrew,saketkc/linuxbrew,gnubila-france/linuxbrew,gnubila-france/linuxbrew,Homebrew/linuxbrew,Angeldude/linuxbrew,reelsense/linuxbrew,Angeldude/linuxbrew,Angeldude/linuxbrew,saketkc/linuxbrew,gnubila-france/linuxbrew,saketkc/linuxbrew,SuperNEMO-DBD/cadfaelbrew,reelsense/linuxbrew,SuperNEMO-DBD/cadfaelbrew,reelsense/linuxbrew,SuperNEMO-DBD/cadfaelbrew